When I was trying to decide between the Hobby and the R10, for my Original Model 6G, the raw data pointed me in the right direction, but I did a target comparison just to double check, the results being as follows:-

As can be seen, there is a noticeable group size reduction with the R10.

Recently, I did the same for my Baikal MP-53M. The figures, oddly enough, pointed at the Geco and, surely enough, I have scored higher with this pellet than the others.

I do, however, intend to run some targets just to see. In theory, my data shows that there shouldn't be any performance difference.

We tested these two pellets back to back on the RMTC range in my Original Model 10, and the 4.50 Meisterkugeln pellets were grouping significantly tighter than the R10 in that particular pistol.

Quite a surprise at first - but then we have noticed the 4.50 size Meisterkugeln frequently performed the best in the Classic air pistols.

As these were the principle pellet used to win all those world records when our Classic Model 65 pistols (and similar) were in their prime, I guess I should not have been so surprised at the results.

We never had a choice of any size other than 4.50 in the 70's, so it could be the manufacturers worked to optimise the pistol to pellet performance, and we can still benefit from this all these years later.

More modern pistols seem to be more often optimised with the 4.49 size of pellet - and maybe this is why it is now also possible to buy the Meiterkugeln's in this additional size as well!

Feinwerkbau P40 Tricolour wanted.........still !http://www.bobsairguns .com - proud to host the RMTC site since April 2011.